Quectel BC65 Hardware Design page 56

UART Universal Asynchronous Receiver & Transmitter
UDP User Datagram Protocol
URC Unsolicited Result Code
USIM Universal Subscriber Identification Module
VSWR Voltage Standing Wave Ratio
Vmax Maximum Voltage Value
Vnorm Normal Voltage Value
Vmin Minimum Voltage Value
V max Maximum Input High Level Voltage Value
IH
V min Minimum Input High Level Voltage Value
IH
V max Maximum Input Low Level Voltage Value
IL
V min Minimum Input Low Level Voltage Value
IL
V max Maximum Output High Level Voltage Value
OH
V min Minimum Output High Level Voltage Value
OH
V max Maximum Output Low Level Voltage Value
OL
V min Minimum Output Low Level Voltage Value
OL
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